The Leadtek GPS 9952 module (LR9552) is a high sensitivity and very compact smart antenna module, with built in GPS receiver circuit. This 20-channel global positioning system (GPS) receiver is designed for a wide range of OEM applications and is based on the fast and deep GPS signal search capabilities of SiRFStarIII architecture.

Features:

Based on the high performance features of the SiRFstarIII single chip set

20 channels with All-In-View tracking

Compact module size for easy integration: 25x25x8.4 mm

Fully automatic assembly: reflow solder assembly ready

Hardware compatible with SiRF GSW3 v 3. 2.2 software

Multiple I/O pins reserved for customizing special user applications

Low power consumption: up to 70 mA, and extra high sensitivity: -158dBm

The Leadtek 9552 OEM GPS comes in two "flavours": RS232 and TTL I/O.Be sure to choose and order the RS-232 version! They both share the same user manual/leaflet!Only the RS-232 works with the TM-D710!!!

9 comentarii:

I used the same Leadtek GPS module (the TTL kind) discribed in your blog, but it gives no NMEA results to my 710E...Are you sure you used the TTL type not the RS232 type? There are two types on the market you know, that come with teh same manual.

Hi, I am also trying to make this modification. I am not sure if my GPS module outputs TTL or RS232 as it can do both, like yours. I have asked Leadtek for help, I hope they answer. In any case, assuming it's RS232 I connected to the resistor that goes to the max232 (or comparable) level converter so I do not need to remove the PCB.

Can you tell me how to make the D710 show the raw NMEA output like you show in one of your pictures? I can't figure out how to make my D710 do that.

Hi Sander, you can check the RAW input by selecting the proper menu on the D710 front panel. Activate APRS12 or APRS9k6.Check if GPS Input is also active and push "K" button (the left horizontal) and then you will see P.MON on the down right side of the LCD. Push that button and, voila, you have raw GPS input on the screen.

my radio has been at kenwood for a few weeks now. I seem to have blown the display processor (my guess). My radio also had a bad resistor in series with the serial input. You can feed GPS data all day long and never get it fed to the radio that way :)

Oh, sad about!I was afraid to tell you that this maight be a possible cause! I believe that the uC is OK. I replace a lot of resistors in series with various uC at Yaesu radios. The most recent was a FT857D with no Mic PTT. The same "series resistor"...

Be aware! The "RS232" is not a +/-12 V RS232 signal. The level of the RS232 logic is TTL (5 V or 3,3 V).So, if you only have a TTL GPS, you need a little logic changer. The 0V stands for a logic "1" and the 3,3V stands for a logic "0". The change can be done with a transistor in common emitter with a pull-up resistor. Take the output from the collector of the transistor.